Perhaps you should try some spelling variations:
"modified quantile estimation algorithms" » "modified quantile estimation algorithm", "modified quantile optimization algorithms", "modified quantile optimisation algorithm", "modified adaptive estimation algorithms"
"modified parameter approximation algorithms" » "modified parameters approximation algorithms"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified parameter approximation algorithms") OR ("modified quantile estimation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified parameter approximation algorithms\") OR (\"modified quantile estimation algorithms\"))*".
• Removing quotes may allow a broader search: (( modified parameter approximation algorithms ) OR ( modified quantile estimation algorithms ))*.